Ultrasonic toothbrush



FIG. 1 is a front view of the ultrasonic toothbrush of my design;

FIG. 2 is a side view of the ultrasonic toothbrush;

FIG. 3 is a rear view of the ultrasonic toothbrush;

FIG. 4 is a top view of the ultrasonic toothbrush;

FIG. 5 is a bottom view of the ultrasonic toothbrush;

FIG. 6 is a front/bottom perspective view of the ultrasonic toothbrush; and,

FIG. 7 is a rear/bottom perspective view of the ultrasonic toothbrush. 

CLAIM The ornamental design for an ultrasonic toothbrush, as shown and described. 